The difference between endometrial cancer 1a and 1b is mainly the different depth of tumor infiltration. Endometrial cancer is a kind of malignant tumor disease, which can be divided into 4 stages according to the severity of the disease, among which 1a and 1b belong to early stage tumors, when the tumors are still confined within the uterine body, the difference between them is the different infiltration depths, endometrial cancer 1a is the depth of invasion of the tumor is less than 1/2 of the myometrium, while 1b refers to the depth of infiltration of the tumor is greater than or equal to 1/2 of the myometrium. Both endometrial cancer 1a and 1b belong to early endometrial cancer, and the preferred treatment is surgery, which usually requires hysterectomy. This disease has a certain recurrence rate, and regular rechecks should be performed after surgery according to doctor’s instructions. If you are suffering from endometrial cancer, you need to go to the hospital as soon as possible for consultation, and the doctor will formulate individualized diagnosis and treatment plan according to your specific condition, so as to avoid delaying your condition.